The internal mechanicals are all the same, and they all mate with the same flavour of cables at that end of the throttle & gear cables. It's the plug on the electrics that will make it "incompatible". (I say that for most carbed engines Obviously if you have a "fly by wire" machine you'll need the dedicated box)

Right now I am driving a Merc using a Yam 703 controller with the lever off a Tohatsu box! The inside of my old Suz box had the same mechanism. Graned I moved al lthe electrics into the console, mostly for ergonimic reasons, but if you don't mind mucking about with wires there is a huigh chance any will work. Just beware of the oddities like the oooold Evenrude / Johnson "electric shift" which needless to say doesn't have a space for a mechanical gear cable.